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First Law of Thermodynamics


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it says that energy diffuses. if you take a cubic foot of space, for example, it will have the same amount of energy in it as the cubic foot of space adjacent to it. if there is a heating source, for example, closer to the adjacent cubic foot of space, of course, it will have more energy in it, but this energy will immediately spread out over the universe.

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IIRC, one can write the equation for the first law of thermodynamics as:


[math]\Delta E_{sys} = -\Delta E_{sur}[/math]


Which means that energy is conserved; if the system gains energy, it comes at the expense of the surroundings, and if the system loses energy, the surroundings take up the lost energy.

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